US9574325B2 - Work vehicle and cab for work vehicle - Google Patents

Work vehicle and cab for work vehicle Download PDF

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Publication number
US9574325B2
US9574325B2 US14/436,972 US201514436972A US9574325B2 US 9574325 B2 US9574325 B2 US 9574325B2 US 201514436972 A US201514436972 A US 201514436972A US 9574325 B2 US9574325 B2 US 9574325B2
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United States
Prior art keywords
wall
cab
foremost
view
gap
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US14/436,972
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US20160305091A1 (en
Inventor
Takeshi Ikeda
Masamichi Miyazaki
Akihiro Miyachi
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Komatsu Ltd
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Komatsu Ltd
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Assigned to KOMATSU LTD. reassignment KOMATSU LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IKEDA, TAKESHI, MIYACHI, AKIHIRO, MIYAZAKI, MASAMICHI
Publication of US20160305091A1 publication Critical patent/US20160305091A1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E02F9/163—Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D33/00—Superstructures for load-carrying vehicles
    • B62D33/06—Drivers' cabs
    • B62D33/0617—Drivers' cabs for tractors or off-the-road vehicles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/06—Endless track vehicles with tracks without ground wheels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7609—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures

Definitions

  • the present invention relates to a work vehicle and a cab for work vehicle.
  • the present invention particularly relates to a work vehicle which has a cab, and a cab for work vehicle.
  • a cab (an operator's compartment) of some crawler dozers has a portion projecting sideward from a body in a plan view.
  • a fuse box is arranged outside the cab, on a side of the cab or below the cab.
  • the present invention was made in view of the problem described above.
  • the object of the present invention is to provide a work vehicle and a cab for work vehicle in which entry of dust into an electric component can be suppressed and an operator is not prevented from moving in the cab by the electric component.
  • a work vehicle has a cab.
  • the cab includes a front portion, a rear portion, a wall portion, and an electric component.
  • the front portion has a doorway.
  • the rear portion is arranged in the rear of the front portion.
  • the rear portion has a front end smaller in width than a rear end of the front portion in a plan view.
  • the wall portion is arranged between the front portion and the rear portion.
  • the wall portion includes a front wall and a rear wall opposed to each other in a fore/aft direction with a gap lying therebetween in a plan view.
  • the wall portion extends from the rear portion outward in a direction of width in a plan view.
  • the electric component is arranged in the gap.
  • the electric component projects into an indoor space in the cab from the gap through a first hole formed in the front wall.
  • a foremost portion of the electric component is located in the rear of a foremost normal located foremost among normals to a line connecting a front end and a rear end of the doorway, which intersect with the front wall in a plan view.
  • the electric component is arranged in the gap between the two walls and in the indoor space in the cab. Therefore, as compared with a case that the electric component is arranged outside the cab, entry of dust into the electric component is suppressed.
  • the electric component is arranged in the gap between the two walls. Therefore, the gap between the two walls is made use of as a region where an electric component is arranged. Thus, a portion of the electric component which projects from between the two walls into the indoor space in the cab is reduced in size. Therefore, the foremost portion of the electric component can be arranged in the rear of the foremost normal. Thus, an operator is not prevented from moving in the cab by the electric component.
  • the cab further includes a cover.
  • the cover is attached to the front wall.
  • the cover covers the electric component projecting into the indoor space in the cab through the first hole.
  • the cover has a beveled portion at a corner portion on an inner side in the direction of width and is located in the rear of the foremost normal in a plan view.
  • the cab further includes a reinforcement plate.
  • the reinforcement plate is attached to the front wall.
  • the reinforcement plate surrounds the first hole.
  • This reinforcement plate suppresses lowering in strength of the cab due to provision of the first hole in the front wall. Therefore, distortion of the cab at the time of overturn of the work vehicle is suppressed.
  • the rear wall has a projecting portion projecting rearward.
  • the gap has a region expanding rearward owing to the projecting portion. At least a part of the electric component is arranged in the region expanding rearward owing to the projecting portion.
  • the projecting portion partially expands the gap rearward.
  • the electric component can be arranged in a portion of the gap expanding rearward. Therefore, the electric component projecting into the indoor space can further be reduced in size.
  • the rear wall includes a main wall and a sub wall.
  • the main wall has a second hole.
  • the sub wall is attached to the main wall and covers the second hole.
  • the sub wall has a member containing a resin in a portion in contact with the main wall.
  • the sub wall is in contact with the main wall with the member containing a resin being interposed. Therefore, a gap is less likely to be formed between the main wall and the sub wall. Thus, soundproof performance and heat insulation performance of the indoor space in the cab are improved.
  • a cab for a work vehicle includes a front portion, a rear portion, a wall portion, and an electric component.
  • the front portion has a doorway.
  • the rear portion is arranged in the rear of the front portion.
  • the rear portion has a front end smaller in width than a rear end of the front portion in a plan view.
  • the wall portion is arranged between the front portion and the rear portion.
  • the wall portion includes a front wall and a rear wall opposed to each other in a fore/aft direction with a gap lying therebetween in a plan view.
  • the wall portion extends from the rear portion outward in a direction of width in a plan view.
  • the electric component is arranged in the gap.
  • the electric component projects into an indoor space in the cab from the gap through a first hole formed in the front wall.
  • a foremost portion of the electric component is located in the rear of a foremost normal located foremost among normals to a line connecting a front end and a rear end of the doorway, which intersect with the front wall in a plan view.
  • the electric component is arranged in the gap between the two walls and in the indoor space in the cab. Therefore, as compared with a case that the electric component is arranged outside the cab, entry of dust into the electric component is suppressed.
  • the electric component is arranged in the gap between the two walls. Therefore, the gap between the two walls is made use of as a region where an electric component is arranged. Thus, a portion of the electric component which projects from between the two walls into the indoor space in the cab is reduced in size. Therefore, the foremost portion of the electric component can be arranged in the rear of the foremost normal. Thus, an operator is not prevented from moving in the cab by the electric component.
  • a work vehicle and a cab in which entry of dust into an electric component can be suppressed and an operator is not prevented from moving in the cab by the electric component can be realized.
  • FIG. 1 is a side view schematically showing a construction of a work vehicle in one embodiment of the present invention.
  • FIG. 2 is an exploded perspective view schematically showing the construction of the work vehicle in one embodiment of the present invention.
  • FIG. 3 is a perspective view schematically showing a cab frame of a cab for work vehicle in one embodiment of the present invention.
  • FIG. 4 is a schematic cross sectional view along the line IV-IV in FIG. 3 , and is a view showing a front portion, a rear portion, and a wall portion of the cab in a plan view.
  • FIG. 5 is a schematic cross sectional view showing a region R in FIG. 4 as being enlarged.
  • FIG. 6 is a schematic cross sectional view along the line VI-VI in FIG. 5 .
  • FIG. 7 is a schematic perspective view showing the construction of a sub wall.
  • FIG. 8 is a perspective view schematically showing the construction around an electric component.
  • FIG. 9 is a schematic cross sectional view for explaining an arrangement position of a fuse cover with respect to a doorway of a cab in the work vehicle shown in FIG. 1 .
  • FIG. 10 is a schematic cross sectional view showing the construction in which a gap between two walls is expanded rearward partially and the electric component (fuse box) is arranged in an expanded region of the gap.
  • a crawler dozer as one example of a work vehicle to which the idea of the present invention is applicable will be described with reference to FIGS. 1 and 2 . It should be noted that the present invention is applicable to a crawler dozer and also to work vehicles having a cab such as a hydraulic excavator, a wheel loader, and the like.
  • a fore/aft direction refers to a fore/aft direction of the operator who sits at the operator's seat.
  • a lateral direction (a width direction) refers to a lateral direction of the operator who sits at the operator's seat.
  • An upward/downward direction refers to an upward/downward direction of the operator who sits at the driver's seat.
  • a direction in which the operator sitting at the operator's seat faces is defined as a fore direction and a direction opposed to the fore direction is defined as an aft direction.
  • a right side and a left side at the time when the operator sitting at the operator's seat faces front are defined as a right direction and a left direction, respectively.
  • the foot side of the operator who sits at the operator's seat is defined as the downward direction, and the head side of the operator is defined as the upward direction.
  • FIGS. 1 and 2 are a side view and an exploded perspective view schematically showing a construction of a work vehicle in one embodiment of the present invention, respectively.
  • a crawler dozer 30 in the present embodiment mainly has a cab (operator's compartment) 1 , a vehicle frame 31 , an engine 32 , an engine cooling module 33 , a nose portion module 34 , a hydraulic oil tank module 35 , a fuel tank module 36 , a pair of track frame modules 37 , and a dozing blade 38 .
  • Cab 1 has an operator's seat in the inside of cab 1 .
  • Vehicle frame 31 has a front end and a rear end.
  • Cab 1 is mounted on vehicle frame 31 , between the front end and the rear end of vehicle frame 31 .
  • An operator's seat, an instrument panel, a steering mechanism, and the like are attached to this cab 1 .
  • Engine 32 is attached to vehicle frame 31 on a front end side of vehicle frame 31 relative to cab 1 .
  • Nose portion module 34 covers engine 32 and an engine compartment.
  • Cab 1 is arranged in the rear of engine 32 and the engine compartment which are covered with nose portion module 34 .
  • Hydraulic oil tank module 35 serves to store a hydraulic oil. Hydraulic oil tank module 35 is arranged on one side (for example, on the left side) of cab 1 . Hydraulic oil serves to actuate a work implement such as dozing blade 38 of crawler dozer 30 . Fuel tank module 36 serves to store fuel to be supplied to engine 32 . Fuel tank module 36 is arranged on the other side (for example, on the right side) of cab 1 .
  • Cooling module 33 serves to cool engine 32 and the like. Cooling module 33 is attached to vehicle frame 31 at the rear end of vehicle frame 31 . Cooling module 33 can include a radiator body portion. The radiator body portion includes a charge air cooling (CAC) apparatus, a hydraulic oil cooling apparatus, an engine cooling water cooling apparatus, and a cooling fan.
  • CAC charge air cooling
  • a cooling module is arranged on a front side of cab 1 .
  • cooling module 33 is arranged at the rear end of vehicle frame 31 as described above, in crawler dozer 30 shown in FIG. 1 . Therefore, a length in a fore-/aft direction of nose portion module 34 in crawler dozer 30 shown in FIG. 1 can be shorter than a length in a fore/aft direction of nose portion module 34 in the general crawler dozer. Furthermore, a height at a front end of nose portion module 34 in crawler dozer 30 shown in FIG. 1 can be smaller than a height at a front end of nose portion module 34 in the general crawler dozer. Accordingly, crawler dozer shown in FIG. 1 can have better front viewability than the general crawler dozer.
  • the cooling fan in cooling module 33 can be driven independently of engine 32 by an electric motor, a hydraulic motor, or the like.
  • a fan speed is variable by means of hydraulic drive.
  • Cooling fluid conduits 32 c , 32 d are connected to an inlet port 33 b and an outlet port 33 e of cooling module 33 .
  • air taken into the engine is cooled.
  • conduits 32 a , 32 b are connected to an inlet port 33 c and an outlet port (not shown) of cooling module 33 .
  • engine cooling water is cooled.
  • An additional conduit (not shown) is connected to an inlet port 33 a and an outlet port 33 d of cooling module 33 .
  • cooled hydraulic oil is supplied to a hydraulic circuit of a vehicle.
  • Cooling module 33 is arranged in the rear of cab 1 , between a rear end portion of hydraulic oil tank module 35 and a rear end portion of fuel tank module 36 . In this construction, an operator can visually recognize a rear area. The rear area is an area above cooling module 33 , between hydraulic oil tank module 35 and fuel tank module 36 . Thus, this crawler dozer 30 provides excellent rear visibility.
  • the pair of track frame modules 37 is arranged on left and right sides of vehicle frame 31 , respectively.
  • Dozing blade 38 is arranged in the front relative to the front end of vehicle frame 31 .
  • FIG. 3 is a perspective view schematically showing from above a cab frame of a cab for work vehicle in one embodiment of the present invention.
  • FIG. 4 is a schematic cross sectional view along the line IV-IV in FIG. 3 .
  • FIG. 5 is a schematic cross sectional view showing region R in FIG. 4 as being enlarged.
  • cab frame 1 a in the present embodiment mainly has a floor frame 2 , a plurality of pillars 3 , 4 , 5 , a stand portion 6 , and a roof portion 7 .
  • Cab frame 1 a has a construction in which floor frame 2 , the plurality of pillars 3 , 4 , 5 , stand portion 6 , and roof portion 7 are integrally assembled by welding.
  • Floor frame 2 is arranged on a bottom portion of cab 1 .
  • Stand portion 6 is connected to an upper surface of floor frame 2 by welding. Stand portion 6 extends upward from floor frame 2 .
  • the plurality of pillars 3 , 4 , 5 are arranged in a side portion of cab 1 . Each of the plurality of pillar 3 , 4 , 5 extends in the upward/downward direction.
  • the plurality of pillars 3 , 4 , 5 include a pair of center pillars 3 on the left and right, a pair of front pillars 4 on the left and right, and a pair of rear pillars 5 on the left and right.
  • the pair of center pillars 3 on the left and right is connected to floor frame 2 by welding.
  • the pair of rear pillars 5 on the left and right is connected to stand portion 6 by welding.
  • Front pillar 4 , center pillar 3 , and rear pillar 5 are arranged sequentially in this order from the front to the rear of cab 1 .
  • Roof portion 7 is arranged in an upper portion of cab 1 . Roof portion 7 is supported against floor frame 2 and stand portion 6 by the plurality of pillars 3 , 4 , 5 . Roof portion 7 is connected to the plurality of pillars 3 , 4 , 5 by welding. A space surrounded by floor frame 2 , the plurality of pillars 3 , 4 , 5 , stand portion 6 , and roof portion 7 is defined as an indoor space 10 in cab 1 .
  • cab 1 (or cab frame 1 a ) has a front portion 1 A, a rear portion 1 B, and a wall portion 1 C.
  • Front portion 1 A is a portion from the front end of floor frame 2 to the froth end of center pillar 3 .
  • Rear portion 1 B is a portion arranged in the rear of the rear end of center pillar 3 .
  • Wall portion 1 C is arranged between front portion 1 A and rear portion 1 B.
  • front portion 1 A has an opening 1 A 1 .
  • Opening 1 A 1 is a doorway 1 A 1 of the above-mentioned indoor space 10 .
  • Opening 1 A 1 is formed in a side surface of front portion 1 A.
  • Doorway (opening) 1 A 1 is surrounded by floor frame 2 , front pillar 4 , center pillar 3 , and roof portion 7 .
  • a door 8 may be attached to doorway 1 A 1 as shown in FIG. 1 .
  • front portion 1 A has a tapered shape in the lower portion of cab frame 1 a in a plan view.
  • a width WA of front portion 1 A becomes smaller from the rear to the front in a plan view.
  • a plan view means viewing floor frame 2 from above and downward as shown in FIG. 4 .
  • Rear portion 1 B is arranged in the rear of front portion 1 A.
  • Rear portion 1 B has a front end having a width WB smaller than width WA of the rear end of front portion 1 A in the lower portion of cab frame 1 a , in a plan view.
  • wall portion 1 C has a front wall 1 Ca and a rear wall 1 Cb.
  • Each of front wall 1 Ca and rear wall 1 Cb extends outward from the front end of rear portion 1 B in the width direction in a plan view.
  • Wall portion 1 C is a projecting portion projecting sideward from the front end of rear portion 1 B.
  • Outward in the width direction means outward of cab 1 from a centerline CL in the width direction of cab 1 with centerline CL ( FIG. 4 ) extending to the fore/aft direction through the center of the width direction of cab 1 being defined as the reference.
  • Front wall 1 Ca and rear wall 1 Cb are opposite to each other in the fore/aft direction in a plan view. There is a gap between front wall 1 Ca and rear wall 1 Cb.
  • Front wall 1 Ca has a first end portion EP 1 and a second end portion EP 2 in a plan view.
  • First end portion EP 1 is located on the inner side in the width direction of front wall 1 Ca.
  • Second end portion EP 2 is located on the outer side in the width direction of front wall 1 Ca.
  • the inner side in the width direction means a side toward centerline CL in the width direction of cab 1 with centerline CL ( FIG. 4 ) extending in the fore/aft direction through the center of the width direction of cab 1 being defined as the reference.
  • Each of front wall 1 Ca and rear wall 1 Cb is connected to each of floor frame 2 and center pillar 3 by welding.
  • a through hole (first hole) 1 Caa is formed in front wall 1 Ca.
  • the gap between two walls 1 Ca and 1 Cb and indoor space 10 of cab 1 are connected to each other by through hole 1 Caa.
  • FIG. 6 is a schematic cross sectional view along the line VI-VI in FIG. 5 .
  • FIG. 7 is a schematic perspective view showing the construction of a sub wall.
  • FIG. 8 is a view for explaining an arrangement position of a fuse cover with respect to a doorway of the cab in the work vehicle shown in FIG. 1 .
  • electric components 11 a , 11 b , and 11 c are arranged in the gap between two walls 1 Ca and 1 Cb.
  • Each of electric component 11 a and electric component 11 b is a fuse box, for example.
  • Electric component 11 c is a relay, for example.
  • Electric component 11 a accommodates more fuses than electric component 11 b .
  • This electric component 11 a is arranged above electric component 11 b.
  • Electric component 11 c which is implemented by a relay is arranged under electric component (fuse box) 11 b .
  • the plurality of electric components (relays) 11 c may be arranged in the gap between two walls 1 Ca and 1 Cb.
  • Electric components 11 a and 11 b project into indoor space 10 in cab 1 from the gap between two walls 1 Ca and 1 Cb by way of through hole 1 Caa of front wall 1 Ca.
  • Each of electric components 11 a and 11 b has a portion arranged in front of a virtual straight line (broken line SR 1 ) which connects an upper end 1 Cab and a lower end 1 Cac of through hole 1 Caa to each other.
  • Electric component 11 c does not project into indoor space 10 of cab 1 by way of through hole 1 Caa, however, electric component 11 c may project into indoor space 10 of cab 1 from the gap between two walls 1 Ca and 1 Cb by way of through hole 1 Caa.
  • Rear wall 1 Cb has a main wall 1 C 1 and a sub wall 1 C 2 .
  • Main wall 1 C 1 is connected to each of floor frame 2 and center pillar 3 by welding.
  • a through hole (second hole) 1 C 1 a is formed in main wall 1 C 1 .
  • Sub wall 1 C 2 is attached to main wall 1 C 1 with a bolt or the like. Sub wall 1 C 2 covers through hole 1 C 1 a of main wall 1 C 1 .
  • sub wall 1 C 2 has a metal plate 1 C 2 a and a resin member 1 C 2 b .
  • Metal plate 1 C 2 a is composed of a metal, such as steel, for example.
  • Metal plate 1 C 2 a has a flat plate 1 C 3 and a cable pull-out portion 1 C 4 .
  • Cable pull-out portion 1 C 4 projects rearward from flat plate 1 C 3 .
  • Cable pull-out portion 1 C 4 has an opening 1 C 4 a in a rear side portion. Opening 1 C 4 a is provided in order to pull out a cable from the gap between two walls 1 Ca and 1 Cb to the outside of cab 1 .
  • Resin member 1 C 2 b is composed of a material containing resin.
  • Resin member 1 C 2 b is composed, for example, of urethane, rubber, or the like.
  • Rear wall 1 Cb may have a projecting portion 1 C 1 b projecting rearward partially.
  • the gap between two walls 1 Ca and 1 Cb has a region ER expanded rearward owing to projecting portion 1 C 1 b .
  • At least a part of electric component 11 c is arranged in this expanded region ER.
  • the whole electric component 11 c may be arranged in expanded region ER.
  • FIGS. 8(A) to 8(C) are perspective views schematically showing the construction around an electric component.
  • reinforcement plate 12 As shown in FIG. 8 (A), reinforcement plate 12 , first cover 13 , and second cover 14 are attached to front wall 1 Ca on the side of indoor space 10 .
  • Reinforcement plate 12 surrounds through hole 1 Caa of front wall 1 Ca.
  • first cover 13 is attached to front wall 1 Ca with reinforcement plate 1 . 2 being interposed.
  • First cover 13 is attached to front wall 1 Ca with a bolt 13 b , for example.
  • First cover 13 has a through hole 13 a.
  • second cover 14 is attached to front wall 1 Ca with reinforcement plate 12 and first cover 13 being interposed.
  • Second cover 14 is attached to front wall 1 Ca by screwing a bolt 14 b into a female screw portion 13 c of first cover 13 , for example.
  • Second cover 14 has a shape projecting into indoor space 10 .
  • a portion of second cover 14 projecting into indoor space 10 covers electric components 11 a and 11 b.
  • a virtual straight line SR 4 connecting front end FP and rear end RP of doorway (opening) 1 A 1 to each other is set in a plan view.
  • Front end FP and rear end RP represent the front end and the rear end in a portion having a minimum opening width W 1 of doorway (opening) 1 A 1 within a range of the height from the upper surface of floor frame 2 to the upper end of second cover 14 .
  • the portion having minimum opening width W 1 is located, for example, at a lowermost end portion of doorway 1 A 1 as shown in FIG. 3 . Therefore, front end FP and rear end RP are located at the lowermost end portion of doorway 1 A 1 .
  • the upper end of second cover 14 is located within a height range, for example, up to 460 mm from the floor.
  • Normal SR 2 is the foremost normal SR 2 located foremost among the normals intersecting with front wall 1 Ca.
  • Foremost normal SR 2 is a straight line which passes through first end portion EP 1 of front wall 1 Ca, for example.
  • first end portion EP 1 is located, for example, in the lowermost end portion of stand portion 6 , as shown in FIG. 3 .
  • Each foremost portion of electric components 11 a to 11 c is located in the rear of foremost normal SR 2 .
  • minimum opening width W 1 of doorway (opening) 1 A 1 is 250 mm or more.
  • Minimum opening width W 1 of doorway (opening) 1 A 1 is 300 mm or more within the height range from 460 mm to 700 mm from the floor.
  • a virtual straight line SR 5 being parallel to foremost normal SR 2 and passing through front end FP of doorway (opening) 1 A 1 is set.
  • each foremost portion of electric components 11 a to 11 c is located in the rear of foremost normal SR 2 . Therefore, obstacles (electric components 11 a to 11 c, second cover 14 , and the like) are not arranged in a region RA (a hatched region in FIG. 9 ) extending from doorway (opening) 1 A 1 to first end portion EP 1 , between straight line SR 5 and foremost normal SR 2 , at all height positions of doorway 1 A 1 .
  • Second cover 14 has a beveled portion 14 a in a plan view.
  • Beveled portion 14 a is formed at a corner portion CP on an inner side in the width direction of second cover 14 , in a plan view.
  • a surface of beveled portion 14 a is substantially parallel to foremost normal SR 2 , for example.
  • Second cover 14 is located in the rear of foremost normal SR 2 .
  • a virtual straight line SR 3 extending parallel to foremost normal SR 2 is set. This straight line SR 3 passes through a foremost portion FF of second cover 14 .
  • Straight line SR 3 is located in the rear of foremost normal SR 2 . There is a gap having a width W 2 between straight line SR 3 and foremost normal SR 2 .
  • Projecting portion 1 C 1 b may be formed in the rear of at least one of electric component 11 a and electric component 11 b , as shown in FIG. 10 .
  • the gap between two walls 1 Ca and 1 Cb has region ER expanding rearward owing to projecting portion 1 C 1 b .
  • At least a part of electric components 11 a and 11 b is arranged in this expanded region ER.
  • the whole electric components 11 a and 11 b may be arranged in expanded region ER.
  • sub wall 1 C 2 may be attached behind projecting portion 1 C 1 b .
  • resin member 1 C 2 b of sub wall 1 C 2 is in contact with the rear surface of projecting portion 1 C 1 b.
  • electric components 11 a to 11 c are arranged in the gap between two walls 1 Ca and 1 Cb and in indoor space 10 in cab 1 . Therefore, as compared with a case that electric components 11 a to 11 c are arranged outside cab 1 , entry of dust into electric components 11 a to 11 c is suppressed.
  • electric components 11 a to 11 c are arranged in the gap between two walls 1 Ca and 1 Cb. Therefore, the gap between two walls 1 Ca and 1 Cb is made effective use of as a region where electric components 11 a to 11 c are arranged. Thus, a portion of electric components 11 a and 11 b which projects from wall 1 Ca into indoor space 10 in cab 1 is reduced in size. Therefore, the foremost portions of electric components 11 a and 11 b can be arranged in the rear of foremost normal SR 2 , as shown in FIG. 9 .
  • obstacles are not arranged in region RA which is defined by extending minimum opening width WI of doorway 1 Al defined under Japanese Industrial Standards and the international standard from doorway 1 A 1 to first end portion EP 1 , as shown in FIG. 9 Accordingly, an operator is not prevented from moving in cab 1 by electric components 11 a and 11 b.
  • wall portion 1 C which connects the rear end of front portion 1 A and the front end of rear portion 1 B has two walls 1 Ca and 1 Cb. Therefore, the strength, soundproof performance, and heat insulation performance of cab 1 are improved. Particularly, two walls 1 Ca and 1 Cb are extended in the width direction. Therefore, even if external force is applied to cab 1 in the width direction at the time of overturn of work vehicle 30 , distortion of cab 1 is suppressed.
  • Second cover 14 is located in the rear of foremost normal SR 2 as shown in FIG. 9 . Thus, the operator is not prevented from moving in cab 1 by second cover 14 .
  • second cover 14 has beveled portion 14 a at corner portion CP on an inner side in the width direction in a plan view. Therefore, second cover 14 can be located in the further rear of foremost normal SR 2 . Specifically, width W 2 between foremost normal SR and straight line SR 3 is increased, as shown in FIG. 9 .
  • Reinforcement plate 12 is attached to front wall 1 Ca and surrounds through hole 1 Caa, as shown in FIG. 8 (A).
  • reinforcement plate 12 suppresses lowering in strength of cab 1 due to provision of through hole 1 Caa in front wall 1 Ca. Accordingly, distortion of cab 1 at the time of overturn of work vehicle 30 is suppressed.
  • Rear wall 1 Cb has projecting portion 1 C 1 b projecting rearward, as shown in FIGS. 6 and 10 .
  • the gap between two walls 1 Ca and 1 Cb has region ER expanding rearward owing to projecting portion 1 C 1 b .
  • At least a part of electric components 11 a to 11 c is arranged in region ER expanded rearward.
  • the projecting portion of electric components 11 a to 11 c projecting into indoor space 10 of cab 1 can further be reduced in size.
  • Sub wall 1 C 2 is attached to main wall 1 C 1 with resin member 1 C 2 b being interposed, as shown in FIGS. 5 and 6 .
  • a gap is less likely to be formed between main wall 1 C 1 and sub wall 1 C 2 .
  • the soundproof performance and heat insulation performance of indoor space 10 of cab 1 are improved.
  • 1 cab 1 A front portion; 1 A 1 doorway (opening); 1 B rear portion; 1 C wall portion; 1 C 1 main wall; 1 C 1 a , 1 Caa, 13 a through hole; 1 C 1 b projecting portion; 1 C 2 sub wall; 1 C 2 a metal plate; 1 C 2 b resin member; 1 C 3 flat plate; 1 C 4 cable pull-out portion; 1 C 4 a opening; 1 Ca, 1 Cb wall; 1 Cab upper end; 1 Cac lower end; 1 a cab frame; 2 floor frame; 3 center pillar; 4 front pillar; 5 rear pillar; 6 stand portion; 7 roof portion; 8 door; 10 indoor space; 11 a , 11 b , 11 c electric component; 11 ab cable; 12 reinforcement plate; 13 first cover; 13 b , 14 b bolt; 13 c female screw portion; 14 second cover; 14 a beveled portion; 30 crawler dozer; 31 vehicle frame; 32 engine; 32 a conduit; 32 c cooling fluid conduit; 33 cooling module; 33 a ,

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Body Structure For Vehicles (AREA)
US14/436,972 2015-03-16 2015-03-16 Work vehicle and cab for work vehicle Active 2035-07-09 US9574325B2 (en)

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PCT/JP2015/057671 WO2015137513A1 (ja) 2015-03-16 2015-03-16 作業車両および作業車両用キャブ

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016172854A1 (en) * 2015-04-28 2016-11-03 Guangxi Liugong Machinery Co., Ltd. Operator's cab arrangement for a construction machine
JP7195105B2 (ja) * 2018-10-09 2022-12-23 株式会社小松製作所 キャブ及び作業機械
CN110001810A (zh) * 2018-10-24 2019-07-12 柳工常州机械有限公司 一种用于安装减速机的底盘结构

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CN105102274B (zh) 2016-08-24
JP5894708B2 (ja) 2016-03-30
WO2015137513A1 (ja) 2015-09-17
CN105102274A (zh) 2015-11-25
JPWO2015137513A1 (ja) 2017-04-06
US20160305091A1 (en) 2016-10-20

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